/* Soot - a J*va Optimization Framework
 * Copyright (C) 1999 Patrice Pominville
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

/*
 * Modified by the Sable Research Group and others 1997-1999.  
 * See the 'credits' file distributed with Soot for the complete list of
 * contributors.  (Soot is distributed at http://www.sable.mcgill.ca/soot)
 */


package soot.baf.toolkits.base;

import java.util.*;

import soot.*;
import soot.baf.*;

/**
 *   Example peephole that remove all checkcast operations.
 *   Resulting class will likely not verify.
 */

public class ExamplePeephole implements Peephole
{
    public boolean apply(Body b) 
    {
        boolean changed = false;
                
        Iterator<Unit> it = b.getUnits().iterator();
        while(it.hasNext()) {
            Unit u = it.next();
            if (u instanceof InstanceCastInst) {
                it.remove();
                changed = true;
            }                
        }

        return changed;
    }
}


